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## Main Question or Discussion Point

Basically, I have been trying to solve my own fictional equation of the amount of weight/mass needed to be dangerous or lethal from roughly 400 feet in the air. I have tried multiple equations and what not to come to no answer besides the answer to the amount of kinetic energy. This does not yield the stress value, or even tell me the amount of stress a human or animal could withstand. I understand it is an odd question, and logically I think 5 pounds dropped from 400 feet would be lethal, but the math would yield the proper answer.